C-F-L, C-F-L!!!! I'm on my second grow and I'm a beliver on CFL growing. The only thing is your going to need to pop some of those btiches on the side for extra light penetration. But I've been growing under CFL and 3 things, 1. They are cheap to replace, 2. The give little to no heat 3. They are kind on the electric bill. My yeild was just under 1 ounce and that was was using only 4 26W CFL. Now I'm my second grow and I got 8 and upgrading to 12 in a few days. Again if you go with CFL make sure you mylar the grow space and use as much as you can.